Schiff was responding to Trump’s tweet earlier Sunday attacking the coverage of the multiple investigations into Russian election interference, which includes examining ties between Trump and Russia.

“Since the first day I took office, all you hear is the phony Democrat excuse for losing the election, Russia, Russia,Russia. Despite this I have the economy booming and have possibly done more than any 10 month President. MAKE AMERICA GREAT AGAIN!”

Since the first day I took office, all you hear is the phony Democrat excuse for losing the election, Russia, Russia,Russia. Despite this I have the economy booming and have possibly done more than any 10 month President. MAKE AMERICA GREAT AGAIN!

“I do feel our democracy is under threat,” Schiff said in an Associated Press interview.

He said Russia poses an external threat, but “in many respects, the challenge from within is more serious because we have a president who takes issue with the 1st Amendment and a president who describes the press as an enemy of the people.”

Schiff also criticized Republican congressional leaders for not challenging Trump on that and other issues. He said Trump’s criticism of judges who rule against him as not legitimate, and his efforts to limit Muslim immigration also threaten democracy. And he said Trump is trying to “disparage” the credibility of the FBI and congressional probes into Russia’s interference in U.S. elections and whether his own 2016 campaign was involved.